My SHTF/LARP/training with friends in the desert rig is set up for the following:
2x UHMWPE plates
IFAK - Israeli bandage, CAT3 TQ, 2x chest seals, quick clot Z fold, NPA 28fr, deco needle, gloves, shears
3 AR mags minimum (I can carry 4 with a slick front)
Radio
Zip ties
Multi tool
I try and keep it slick and light weight. I cant tell you what brand to go with; as I roll my own kit. I honestly don't love anything on the market.
EDIT:
Found an old picture of one of my first prototypes:
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